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Liquid Crystals and their Application
Russian Journal

Zhidkie kristally i ikh prakticheskoe ispol'zovanie

Жидкие кристаллы и их практическое использование

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Rus Eng


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Zhidk. krist. ikh prakt. ispol'z. = Liq. Cryst. and their Appl., 2011, 3, 62—70.

Binary Liquid Crystalline Systems Composed of Poly(Propylene Imine) Dendrimer and p-n-Pentyloxy-p'-Cyanobiphenyl II. Thermodynamics of Dissolution of n-Alkanes and n-Alkanols at Infinite Dilution

S. V. Blokhina1, M. V.Ol'khovich1, A. V. Sharapova1, N. V. Usol'tseva2

Author affiliations
1Institute of Solution Chemistry, Russian Academy of Sciences
153045 Ivanovo, Akademicheskaya Str., 1. 
2Ivanovo State University, Nanomaterials Research Institute
153025 Ivanovo, Ermak Str., 39. 

Thermodynamics of solution of n-alkanes and n-alkanols in the binary sorbents composed of the liquid crystalline poly(propylene imine) dendrimer and nematic p-n-pentyloxy-p'-cyanobyphenyl has been studied by inverse gas chromatography. Dependences of the activity coefficients of the solutes on composition of the sorbents are revealed to exhibit the minimum. Thermodynamic solute – sorbent compatibility characterized by the activity coefficients of the solutes is dependent on the sorbent composition; namely, it is controlled by counterbalancing of the enthalpy or entropy factors. The non-additive mode of the solute – sorbent interaction is explained by arising of the microdomain nematic structure enclosed in the columnar structure of the dendrimer.

Keywords: inverse gas chromatography, liquid crystalline poly(propylene imine) dendrimer, nematic p-n-pentyloxy-p'-cyanobyphenyl, thermodynamics of solution, activity coefficient.

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